Is there a planetary gear hub available?

[Joaquin Suavve]

Here is my thread that show what I was planning for them:

Introduction & Project Explanation

They are just the "raw" gears! You (or someone) would have to machine them into a usable gear reduction "package".

 

[lnanek]

Yeah, 30 tooth cog on the back seems huge:

I only ever use rear hub motors and 99% of the time I have an 11t cog in back and 75t in front. Keeping the throttle full and letting go of the brakes lets the motor handle accelerating from stop lights fine, so my gearing is only so I can get exercise pedaling at 30mph for the hour long commute to work instead of ghost pedaling.

I have zero interest in going above 30mph because cops already like to pace me and check if I'm pedaling, and would never mountain bike since I've broken a hip bicycling before so consider it too dangerous. So no need for a mid drive with exotic gearing for high speed or mountaineering here. Nice simple rear hubs all the way for me.

I do love how I can shift the Shimano IGH while at stop lights on my acoustic bike, though. Way better than derailleurs. Too bad my ebike has no need for shifting.

 

[Chalo]

Too bad my ebike has no need for shifting.

Every e-bike can use at least two gears: one for when the electrics are working, and one for when they're not.

 

[lnanek]

Technically there's some old Tourney 7 speed derailleur mounted that would work if I ripped the super tight chain guide off if really needed to get home after a battery dies.

I charge at work and keep a spare second battery on the rear rack, though. So unlikely. Going over bumps at 30mph without the chain guide was throwing the chain, so I happily gave up the gears to never have that happen again. I suppose a modern derailleur would have a clutch. I consider changing gears on my ebike an annoyance anyway, though, so only thing I'd be willing to upgrade to is an automatic like Enviolo offers or a CVT.

Worst case I'd just u-lock it to the nearest street sign, Uber home, and come rescue it with my car.

 

[amberwolf]

Every e-bike can use at least two gears: one for when the electrics are working, and one for when they're not.

That's assuming the pedals are going to provide any of the power input when the electrics are still working.

(I'd like to be able to do that on the SB Cruiser, but since it has to be geared so low that it's max speed via pedals only is maybe 1mph it would take a second stage of gearshifting (beyond the IGH and front chainring set) to get me a matching gear for 20mph motor powered speed).

 

[Chalo]

That's assuming the pedals are going to provide any of the power input when the electrics are still working.

(I'd like to be able to do that on the SB Cruiser, but since it has to be geared so low that it's max speed via pedals only is maybe 1mph it would take a second stage of gearshifting (beyond the IGH and front chainring set) to get me a matching gear for 20mph motor powered speed).

I recently adopted a Worksman PAV trike and put my old Crystalyte 5305 on the front. It has what looks like 32/20 gearing on a 24" drive wheel, so it's fit for its (very very slow) intended purpose. In effect, there's no overlap between the motorized speed range and the pedal only speed range. I thought for a brief moment about swapping in an IGH for the single speed coaster hub that transmits pedal power and braking to one of the rear wheels, but decided that the pedals were really only a self-rescue device.

 

[Hummina Shadeeba]

do almost the whole length inside the hub with nylon double helical gears. A two part hub bolted or preferably threaded, in the middle with the two halves of the ring gear being split there for ability to assemble.